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“We didn’t anticipate the changes that happened (in Greenland) in the last ten or 15 years,” says glaciologist Gordon Hamilton. “The ice sheet has waxed and waned with time for sure, but I don’t think it’s been through such a large set of changes in such a short period of time.” Hamilton hopes the new high-definition laser scanner he and his colleagues have just installed on the rim of Greenland's Helheim glacier will help keep pace better with the rapid changes in the region. Greenland, 2015. Image by Ari Daniel.